Eventlog system log error

One of our server shows error in System log in a eventlog. Error is “Because of repeated network problems, the time service has not been able to find a domain controller to synchronize with for a long time. To reduce network traffic, the time service will wait 960 minutes before trying again. No synchronization will take place during this interval, even if network connectivity is restored. Accumulated time errors may cause certain network operations to fail. To tell the time service that network connectivity has been restored and that it should resynchronize, execute “w32tm /s” from the command line. ”

I execute w32tm/s command in dos prompt. After executing this command also generating same error.

What is the solution for this problem?